PlayerListener::PlayerListener( QObject* parent ) throw( std::runtime_error ) : QLocalServer( parent ) { connect( this, SIGNAL(newConnection()), SLOT(onNewConnection()) ); #ifdef WIN32 std::string s; DWORD r = scrobSubPipeName( &s ); if (r != 0) throw std::runtime_error( formatWin32Error( r ) ); QString const name = QString::fromStdString( s ); #else QString const name = "lastfm_scrobsub"; #endif if (!listen( name )) throw std::runtime_error( errorString().toStdString() ); }
void NamedPipeServer::run() { DWORD i, dwWait, cbRet, dwErr; BOOL fSuccess; QByteArray response; std::string s; DWORD r = scrobSubPipeName( &s ); if (r != 0) throw std::runtime_error( formatWin32Error( r ) ); QString const name = QString::fromStdString( s ); // The initial loop creates several instances of a named pipe // along with an event object for each instance. An // overlapped ConnectNamedPipe operation is started for // each instance. for (i = 0; i < INSTANCES; i++) { // Create an event object for this instance. hEvents[i] = CreateEvent( NULL, // default security attribute TRUE, // manual-reset event TRUE, // initial state = signaled NULL); // unnamed event object if (hEvents[i] == NULL) { printf("CreateEvent failed with %d.\n", GetLastError()); return; } Pipe[i].oOverlap.hEvent = hEvents[i]; Pipe[i].hPipeInst = CreateNamedPipe( (const wchar_t *)name.utf16(), // pipe name PIPE_ACCESS_DUPLEX | // read/write access FILE_FLAG_OVERLAPPED, // overlapped mode PIPE_TYPE_MESSAGE | // message-type pipe PIPE_READMODE_MESSAGE | // message-read mode PIPE_WAIT, // blocking mode INSTANCES, // number of instances BUFSIZE*sizeof(TCHAR), // output buffer size BUFSIZE*sizeof(TCHAR), // input buffer size PIPE_TIMEOUT, // client time-out NULL); // default security attributes if (Pipe[i].hPipeInst == INVALID_HANDLE_VALUE) { printf("CreateNamedPipe failed with %d.\n", GetLastError()); return; } // Call the subroutine to connect to the new client Pipe[i].fPendingIO = ConnectToNewClient( Pipe[i].hPipeInst, &Pipe[i].oOverlap); Pipe[i].dwState = Pipe[i].fPendingIO ? CONNECTING_STATE : // still connecting READING_STATE; // ready to read } while (1) { // Wait for the event object to be signaled, indicating // completion of an overlapped read, write, or // connect operation. dwWait = WaitForMultipleObjects( INSTANCES, // number of event objects hEvents, // array of event objects FALSE, // does not wait for all INFINITE); // waits indefinitely // dwWait shows which pipe completed the operation. i = dwWait - WAIT_OBJECT_0; // determines which pipe if (i < 0 || i > (INSTANCES - 1)) { printf("Index out of range.\n"); return; } // Get the result if the operation was pending. if (Pipe[i].fPendingIO) { fSuccess = GetOverlappedResult( Pipe[i].hPipeInst, // handle to pipe &Pipe[i].oOverlap, // OVERLAPPED structure &cbRet, // bytes transferred FALSE); // do not wait switch (Pipe[i].dwState) { // Pending connect operation case CONNECTING_STATE: if (! fSuccess) { printf("Error %d.\n", GetLastError()); return; } Pipe[i].dwState = READING_STATE; break; // Pending read operation case READING_STATE: if (! fSuccess || cbRet == 0) { DisconnectAndReconnect(i); continue; } Pipe[i].cbRead = cbRet; Pipe[i].dwState = WRITING_STATE; break; // Pending write operation case WRITING_STATE: if (! fSuccess || cbRet != Pipe[i].cbToWrite) { DisconnectAndReconnect(i); continue; } Pipe[i].dwState = READING_STATE; break; default: { printf("Invalid pipe state.\n"); return; } } } // The pipe state determines which operation to do next. switch (Pipe[i].dwState) { // READING_STATE: // The pipe instance is connected to the client // and is ready to read a request from the client. case READING_STATE: fSuccess = ReadFile( Pipe[i].hPipeInst, Pipe[i].chRequest, BUFSIZE*sizeof(TCHAR), &Pipe[i].cbRead, &Pipe[i].oOverlap); // The read operation completed successfully. if (fSuccess && Pipe[i].cbRead != 0) { Pipe[i].fPendingIO = FALSE; Pipe[i].dwState = WRITING_STATE; continue; } // The read operation is still pending. dwErr = GetLastError(); if (! fSuccess && (dwErr == ERROR_IO_PENDING)) { Pipe[i].fPendingIO = TRUE; continue; } // An error occurred; disconnect from the client. DisconnectAndReconnect(i); break; // WRITING_STATE: // The request was successfully read from the client. // Get the reply data and write it to the client. case WRITING_STATE: response = emit lineReady( QString::fromUtf8( (char*)Pipe[i].chRequest, Pipe[i].cbRead ) ).toUtf8(); StringCchCopy( Pipe[i].chReply, BUFSIZE, (LPCTSTR)response.data() ); Pipe[i].cbToWrite = response.size(); fSuccess = WriteFile( Pipe[i].hPipeInst, Pipe[i].chReply, Pipe[i].cbToWrite, &cbRet, &Pipe[i].oOverlap); // The write operation completed successfully. if (fSuccess && cbRet == Pipe[i].cbToWrite) { Pipe[i].fPendingIO = FALSE; Pipe[i].dwState = READING_STATE; continue; } // The write operation is still pending. dwErr = GetLastError(); if (! fSuccess && (dwErr == ERROR_IO_PENDING)) { Pipe[i].fPendingIO = TRUE; continue; } // An error occurred; disconnect from the client. DisconnectAndReconnect(i); break; default: { printf("Invalid pipe state.\n"); return; } } } }